Some buyable recipe books from vendors do not tell you if you have unlocked all of the recopies in the book before buying it and checking after the fact. Is there any better way than A. Buying and potentially wasting resources because they are all unlocked B. look up the book on wiki and check each individual recopies? Some items on the wiki like the pact supply network show what recipes are still needed, which is amazing and would be super useful in other areas. Also, is there a place you can enter your key to check what non-discoverable recipes you have left to unlock?